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论文类型：期刊论文

发表时间：2018-10-01

发表刊物：JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES

收录刊物：SCIE

卷号：32

期号：5

ISSN号：0887-3828

关键字：Cable-stayed bridge; Monitoring-based analysis; Structural temperature; Quasi-static deflection; Correlation-based estimation

摘要：Thermal actions have a great influence on the girder deflection variability of long-span cable-stayed bridges. The main objective of this study is to investigate the variability of the bridge girder deflection under thermal actions. A monitoring-based analysis of thermal actions and temperature-induced bridge girder deflection for a combined highway and railway cable-stayed bridge has been carried out; the correlation between the girder deflections at different positions is analyzed; a detailed analysis on the correlation between the structural temperature and the girder deflections has also been performed. Furthermore, the double thresholds with a specific probability for the deflection estimates are proposed. It is revealed that a strong linear relationship exists between the structural temperature and girder deflections. The proposed method can provide good estimates of the bridge girder deflections based on long-term monitoring temperature data.